It appeared that the Carnival Row actress, who had been dating the Pretty Little Liars star for nearly a year and a half, announced that she and Benson split in a very terse and straightforward tweet that was posted on Monday night.
"Me and Ashley broke up," the tweet read, which has since been deleted. However, ET has learned that Delevingne’s Twitter was hacked at the time.
Benson also later replied to a fan on Instagram who asked if she broke up with Delevingne.
"Nope," she replied.
While the breakup tweet was only up for less than 20 minutes, many fans responded to the surprising post with messages of support and love.
Benson, 29, and Delevingne, 26, first sparked romance rumors in August 2018, when paparazzi caught the two kissing in London. The two fueled the fire even more when Benson commented "mine" under an Instagram photo of Delevingne one month later, and plenty of PDA-filled pics of the two have surfaced since then.
Delevingne was this year's recipient of the Trevor Project Hero Award, and during her acceptance speech, she wasn't shy about expressing her love for girlfriend.
"I also have another very special woman in this room to thank, and you know who you are," she mused. "She's one of the people who helped me love myself when I needed it most and I really needed it. She showed me what real love is and how to accept it, which is a lot harder than I thought."
Check out the video below to hear more about their romance: